It would be nice if e.g. `FeatureCollection.fromJson(json)` would validate the `json` data against the [GeoJSON schema](https://geojson.org/schema/GeoJSON.json). Maybe with [`networknt/json-schema-validator`](https://github.com/networknt/json-schema-validator)? _Related: https://github.com/mapbox/mapbox-gl-js/issues/5134_